<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
        .box{
            width: 230px;
            height: 160px;
            /* background: #58a;
            background-image: repeating-linear-gradient(30deg,
            hsla(0,0%,100%,.1),
            hsla(0,0%,100%,.1) 30px,
            transparent 0, transparent 50px); */
            background: repeating-linear-gradient(30deg, #79b,#79b 30px ,transparent 0, transparent 50px);
        }
    </style>
</head>
<body>
    <div class="box">

    </div>
</body>
</html>